Black enamel 300mmHg manometer exceeds industry standard. Navy blue nylon cuff with range markings to facilitate selection of correct cuff size and gauge holder. Chrome-plated deflation valve.Threaded chestpiece drum of chrome plated zinc permits the use of five interchangeable chestpiece fittings - an adult and pediatric diaphragm, and three bells (1 1/4", 1", 3/4") - for complete diagnostic capability on most patients. Double tube configuration, not made with natural rubber latex.